Updating Device Drivers with Cab. Files

I was updating drivers for devices on my PC. I found a driver update for the display adapters a Microsoft Cabinet File 200000268_69e51a687acc555a97b220bb0facacfc2060c7dc.cab I can just double click this cab file to extract the contents 6bin, 4dll, 1sys, 5 vp , 1inf -ormation, 1cpa and 1cat file, and nothing really different using the command prompt while at the location directory the cab file is in “expand *.cab -f:igdumd32.dll C:\ERIC” I haven't had a file yet that has expanded they only seem to copy to C:\ERIC. I want to know how to update the display adapters with a cabinet file? I thought I could run add new hardware and windows would find the cab file but that doesn't seem to work.

Microsoft Windows XP Professional, Service Pack 3, 32 bit
Intel Pentium III Xeon processor, x86 Family 6 Model 23 Stepping 10
Processor Count: 2
RAM: 1917 Mb
Graphics Card: Intel(R) G45/G43 Express Chipset, 1024 Mb
Hard Drives: C: Total - 52378 MB, Free - 42899 MB; D: Total - 102742 MB, Free - 102658 MB; E: Total - 150123 MB, Free - 150047 MB;
Motherboard: ASUSTeK Computer INC., P5Q-EM
Antivirus: COMODO Antivirus, Updated: Yes, On-Demand Scanner: Enabled